George w



G. W HUNTER. Sewing-Machine.

MPEIERS, FHOTO-UTNOGFAPMER, WASHINGTON D c.

FFICE.

UNITED STATES PATENT GEORGE W. HUNTER, OF WASHINGTON, D. 0., ASSIGNOR TO HIMSELF, HENRY M. BAKER, AND JAMES H. VERMILYA, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 223,229, dated January 6, 1880.

Application filed June 14, 1879.

To all whom it may concern: and understood by reference to the accompa- Be it known that I, GEORGE W. HUNTER, nying drawings, in which of \Vashington, District of Columbia, have in- Figure l is a side elevation of so much of a vented certain new and useful Improvements sewing-machine as is needed to illustrate my 5 in Sewing-Machines, of which the following is improvements, with the side of the goose-neck a specification. removed in order to expose to View the ivork- My invention is directed to means for iming parts contained therein. Fig. 2 is a front parting movement to the feed and the differelevation of the shuttle-driving and feed deent members of the stitch-formin g mechanism vices.

10 of a sewing-machine. The machine shown in the drawings is a My object is to simplify the construction of shuttle-machine, and the driving-arm is there the machine, to reduce .the number of parts, represented as arranged to actuate the needleand consequently the cost of manufacture, bar and the shuttle-driving and feed-operatwithout detracting from the efficiency of the ing devices.

15 working parts. A is the gooseni-ck, and B is the cloth-plate,

The iirincipal member of the movement-imof the machine. In the goose-neck is the drivparting mechanism is what I term the drivingarm, hereinbefore referred to, (marked 0.) ing-arm-an arm, bar, or rod which has a At or near its front end it is connected with movement of longitudinal reciprocation, and the frame or goose-neck by a guide-pin and 20 is connected at or near its front end to the slot or groove connection, the groove to being,

machine-frame by a pin and slot or groove in this instance, formed in the frame, while connection, which determines the path or the pin or roller-stud bis carried by the arm course of the front end of said longitudinally and projects into the groove. reciprocating arm. This driving-arm may be The inclination and shape of the groove will 25 used to actuate the needle-bar, or the feed, or determine the path of movement of the front the shuttle, or other under member of the end of the arm when said arm by proper stitch-formin g mechanism; or it may be used means is moved back and forth longitudinally. to actuate any two of said parts, or all of The arm, when used to actuate the needlethem, as desired. bar D, is connected with said bar by a pin and 30 When used to actuate the needle-bar, its slot or groove connection also, the groove 0,

movement of longitudii'lal reciprocation can in this instance, being formed in a rearwardlybe obtained in any suitable known way and projecting piece, D, fast to the needle'bar, by any suitable known means. while the pin or roller-stud d for that groove When used to actuate the feed or shuttle, it is attached to and projects from the arm.

3 5 is necessary that its reciprocatory movement when the grooves a c are arranged with should be of a peculiar character, such as relation to one another as shown, and when would result from a crank-connection with the the arm is reciprocated longitudinally, it will frame at its rear end in conjunction with the be seen that the back-and-forth movement of pin'and-slot connection at its front, this being the pins 1) d in their respective grooves will 0 requisite in order to impart to the end of the cause the vertical reciprocation of the needlearm back of or below said crank-connection a bar, and that the extent of said movement 0 movement of vibration in addition to bodily will be determined by the inclination of both back-and-forth movement, thus obtaining a grooves, (or of either groove, supposing only compound movement which can be utilized to one to be inclined,) in conjunction with the 45 revolve a shaft below the bed-plate of the ma length of longitudinal reciprocation of thearm.

chine. I prefer to arrange the grooves converging 5 The nature of my invention and the manto the rear, as shown, and it is manifest that nor in which the same is or may be carried they may be so formed as to give to the neeinto efi'ect can, however, best be explained dle-bar the proper dip, and such other characteristics of movement as may be found necessary.

As hereinbefore stated, the longitudinal reciprocation of the driving-arm, so far as concerns its action on the needle-bar, may be effected by any suitable means. Inasmuch, however, as I use said arm to transmit motion to the moving parts below the cloth-plate, I mount it at its rear on a cranlepin, f, or its equivalent, such as an eccentric. The crankpin may be mounted on any proper rerolving body. In this instance it is a wrist-pin upon the face of a miter-gear, E, mounted on a stud, g, attached to the standard or goose-neck at right angles to the short driving-shaft h, which is driven by belting connected with the pulley and fly-wheel G, and has keyed to it a mitergear, '13, which meshes with gear E. \Vhen, therefore the crank revol 'es, the rear end of the driving-arm will have an up-and-down as well as back-aml-forth movement. It is held, indeed, by the crank fat one end and the pin 1) at theother, these points constituting what may be called fulcra, neither of which is stationary or at rest when the machine is in operation. I thus obtain for that part of the driving-arm back of or below the crank-pin an oscillatory or vibratory motion, which can be availed of to actuate the feed or the shuttle operating devices beneath the cloth-plate. This I prefer to accomplish by making the arm solid and in one piece, of yoke form, continuin g it from the crankconnection vertically down below the bed-plate, and thence horizontally, or nearly so, thereunder, extending it far enough forward to connect with a crank-arm, 11, on a cross-shaft, H, secured in proper bearin s on the under side of the cloth-plate, and carrying on its opposite end the face-cam j and eccentric or peripheral cam k, for giving the up and forward movements to the feeddog I.

To a radial extension on the face-cam j is jointed a connecting-rod, Z, jointed atits other end to the reciprocating shuttle-carrier J at m.

It is not necessary to enter into the details of the construction and arrangement of the shuttle-carrier or the feed-dog and its operating devices, these being of the usual and wellknown character.

The lower front end of the yoke shaped driving-arm isprovided with a laterally-projecting pin or roller-stud, n, which enters a slot in the crank-arm 2'.

When the machine is in motion, the crank f revolving in the direction of the arrow, it will beseen that the under branch of the yokeshaped arm will have a combined up-and-down and longitudinal toand-fro movement, which will cause its front end to move in an approximately-circular path, the shape of its orbit or path of movement being determined by the relative position of the points f and b, which vary constantly during each revolution of the drivingcrank. By reason of this movement the arm is caused to revolve the crank-arm t, and consequently the shaft H. I thus, through the instrumentality of the one driving-arm, actuate both the needle-bar and the active members of the sewing mechanism, which are beneath the cloth-plate.

Having now described my improvements, what I claim, and desire to secure by Letters Patent, is as follows:

1. In combination with the needle-bar, the longitudinally-reciprocatory driving-arm connected at its front end with the goose-neck 'or frame and the needle-bar by pin and slot or groove connections, positioned with respect to one another substantially as set forth, whereby the traversing movement of the pins in their respective grooves due to the longitudinal reciprocation of the arm shall effect the vertical reciprocation of the needle-bar.

2. In combination with the driving-crank or its equivalent and the goose-neck or frame, the driving-arm mounted at its rear end on said crank and connected at its front end with said goose-neck by apin and slot or groove connection, said crank and pin constituting the movable fulcra of said arm, substantially as set forth.

3. The driving-arm mounted on movable fulcra, as described, in combination with the "erticallymovable needle-bar and the pin and slot or groove connection between said bar and arm, substantially as and for the purposes set forth.

4. The yokeshaped driving-arm mounted on movable fulcra, as described, in combination with the shuttle or feed, or both shuttle and feed, operating shaft connected with and rotated by the lower branch of said driving arm, substantially as set forth.

5. The yoke-shaped driving-arm mounted on movable fulcra, as described, in combination with the needle-bar, connected with the upper branch of said driving-arm by a pin and slot or groove connection, and the shuttle or feed, or both shuttle and feed, operating shaft connected with and rotated by the lower branch of said driving-arm, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEO. IV. HUNTER.

Witnesses J. M. R. JERMON, J. W. JERMON. 

